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基于NDVI-Ts特征空间的黑龙江省干旱监测

于敏 程明虎

于敏, 程明虎. 基于NDVI-Ts特征空间的黑龙江省干旱监测. 应用气象学报, 2010, 21(2): 221-228..
引用本文: 于敏, 程明虎. 基于NDVI-Ts特征空间的黑龙江省干旱监测. 应用气象学报, 2010, 21(2): 221-228.
Yu Min, Cheng Minghu. Drought monitoring in Heilongjiang Province based on NDVI-Ts space. J Appl Meteor Sci, 2010, 21(2): 221-228.
Citation: Yu Min, Cheng Minghu. Drought monitoring in Heilongjiang Province based on NDVI-Ts space. J Appl Meteor Sci, 2010, 21(2): 221-228.

基于NDVI-Ts特征空间的黑龙江省干旱监测

资助项目: 

国家自然科学基金项目资助 40575009

Drought Monitoring in Heilongjiang Province Based on NDVI-Ts Space

  • 摘要: NDVI-Ts特征空间方法结合了卫星遥感地表反射率和热红外特性,能较好地反映一定时空尺度的地表干旱状况,该文基于Terra MODIS 归一化植被指数(NDVI)和地表温度(LST)产品,构建NDVI-Ts三角形特征空间,采用植被温度状态指数结合MODIS地表分类产品IGBP对黑龙江省2007年夏季干旱进行监测和分析。结果显示:此次夏季干旱的空间分布广,持续时间长,干旱程度重,西部松嫩平原和东部三江平原等地主要农作物产区普遍发生干旱,且旱情严重。结合同期地面气象观测的月降水量数据对监测结果进行验证和评估表明:植被温度状态指数是一项近实时的干旱监测指标,不仅与当地最近的降水事件有关,而且与前期一段时间内的总体降水事件相关,可以较真实地反映当地干旱发生、发展的动态过程。
  • 图  1  NDVI-Ts三角形空间

    Fig. 1  Triangular space of NDVI-Ts

    图  2  研究区域主要地表覆盖类型

    Fig. 2  The main land cover types for the whole study area

    图  3  黑龙江省农田和森林分布 (省界内白色区域为其他地表覆盖类型)

    Fig. 3  The distribution of crop and forest in Heilongjiang Province (white areas are other land covers)

    图  4  2007年各监测时段NDVI-Ts散点图

    Fig. 4  Scatter plots of NDVI-Ts during different periods in 2007

    图  5  2007年各监测时段IVTC分布图像 (省界内白色区域为水体和受云影响的区域)

    Fig. 5  TheIVTCimages for Heilongjiang Province during different periods in 2007(the white plots are water and the pixels contaminated with cloud)

    图  6  2007年各监测时段IVTC频率分布图

    Fig. 6  The plots of IVTC frequency for Heilongjiang Province during different periods in 2007

    表  1  2007年各监测时段干、湿边方程

    Table  1  The equations of dry and wet edges for the different periods in 2007

    表  2  2007年各监测时段IVTC平均值及标准差

    Table  2  The average and standar ddeviation for the differen tperiods in 2007

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出版历程
  • 收稿日期:  2009-08-05
  • 修回日期:  2010-02-04
  • 刊出日期:  2010-04-30

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